WARNING: This story contains graphic photos of the victim's injuries.
A 45-year-old woman has suffered a serious head injury after a man threw a tool through her car window in Greenfields.
The woman was driving her white Ford Falcon sedan on Murdoch Drive around 7pm on Tuesday and as she turned left onto Mississippi Drive a man ran up to her car and threw a socket extender through her driver's window.
The tool hit the woman in the head leaving a large cut.
She drove a short distance to a nearby acquaintances home.
The victim was then treated at Peel Health Campus and received 18 staples in her head.
The man is described as dark skinned, in his 20’s, 170cm tall, stocky build and was wearing a black hooded jumper and black shorts.
Detectives would like anyone to speak to anyone who witnessed the incident or saw any suspicious activity in Bortolo Park around the time of this incident.
Anyone with dash-cam footage or any information is asked to contact Crime Stoppers 1800 333 000 or report online at www.crimestopperswa.com.au.